Answer:
A) That this value is an underestimate of the true number of microbes in our lower intestine
Explanation:
A microbiologist is a scientist who studies microscopic organisms including bacteria, algae, and fungi. Often, they study organisms that cause disease and environmental damage or are of industrial or agricultural interest. They also study the characteristics of nonliving pathogens, such as viruses and prions.
There are 4 nucleotides in DNA molecules: guanine (G), cytosine (C), adenine (A), and thymine (T).
Guanine and cytosine bind together (G-C), and adenine and thymine bind together (A-T). These are the only two possible binds in a DNA molecule.
Answer A has a guanine and adenine bond (G-A), which is impossible.
Answer B has a cytosine and cytosine bond (C-C), which is impossible.
Answer D has a cytosine and thymine bond (C-T), which is impossible.
Through the process of elimination, the answer is C.
Answer:
Sand dune formation
Explanation:
Glaciation needs a cold environment to happe, so sand dune formation would not be likely to occur in a cold place.
Answer: Tetrapods
Explanation:
Tetrapods are the most recent common ancestor with the lungfish look like.
Ancient species of lung fish are the ancestors of tetrapods. These fish may live on land, breathing air and being propelled by their pelvic fins. Australia has three populations of the few remaining lungfish — two marine populations and one inhabiting the Mary River basin in Queensland.
Hence, tetrapods are most common ancestors with lung fish.